Django - Context Variables

Question

I've been looking all over stack and I just can't get anything to work.

The simpler for of my doubt is, I have a context variable, which I have to reassign inside a for loop, and I can, but when a new iteration begins, the variable is reset to it's original context value. So my question is, how do I keep the assigned value persistent throughout the loop?

I am assigning the value like this:

{% with task.new_stage as current %}{% endwith %}

The full excerpt of the code follows:

{% for task in tasks_list %}
<h3>At Beg {{current}}</h3>
{% if task.project_stage.id != current %}
<div id="tasks-container-{{ task.project_stage.id }}" class="task-container btn-group-vertical col-md-3">
{% endif %}
    <div class="panel my-panel tasks-panel col-md-11 {% if task.project_stage.has_started and not task.project_stage.has_ended %}active{% endif %} ">
        <span class="text-uppercase">{{ task.task_name }}</span>
        <div class="col-md-12">
            <img id="task-{{ task.id }}" class="download-pdf" src="{% static 'dpp/images/cloud.png' %}" />
        </div>
    </div>
{% if task.project_stage.id != current %}
</div>{% with task.new_stage as current %}<h3>At End{{current}}</h3>{% endwith %}
{% endif %}
{% endfor %}

View:

def get(self, request):
    if not request.user.is_authenticated():
        form = self.form_class(None)
        return render(request, 'dpp/login.html', {'form': form})

    tasks_list = ProjectTask.objects.all()
    context = {
        'tasks_list' : tasks_list,
        'current' : 0,
    }
    return render(request, self.template_name, context)

Daniel Roseman · Accepted Answer · 2017-05-24 11:22:44Z

2

The context of {% with %} lasts until {% endwith %}. You end the block immediately after starting it, so it literally has no effect.

You shouldn't be trying to reassign variables inside the context. If you just want to check if something has changed since the last iteration, you should use the template tag specifically designed for that: ifchanged.

answered May 24, 2017 at 11:22

Daniel Roseman

602k68 gold badges910 silver badges923 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Renato Santos Over a year ago

So, now I now a little bit more about Django and it's withs :P Thanks a million!! I have now been able to do what I wanted

Collectives™ on Stack Overflow

Django - Context Variables

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related